Circuit Design Projects
As an EE student, I’ve worked on multiple projects throughout my academic career, such as a custom blood pressure monitor built fully on a breadboard, PCB schematics for scanning the internal conductivity structures of dense metals and more recently power supplies for microfluidics chips
Signal Processing Pipeline for cell flow data collection and Analysis
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Custom Power Supply
Making a custom power supply for powering a microfluidics chip setup where input is +12V 5A and output is 5V and 2A constant
Vacuum Pump Device for Microfluidics Chip
I created a vacuum pump using an MPRLS sensor, an Arduino, a DC motor connected to an air valve, a p-MOSFET and an npn transistor. The MPRLS sensor was connected to a simple tube that was connected to the air pump to maintain a pressure differential, and this was done by a control loop with the arduino and the sensor and the air pump. The air pump required a 12V supply which necessitated the use of the p-MOSFET and the npn transistor acting as the switch to the gate of the p-MOSFET
Custom PCB design for 3D imaging of metal conductivities
To achieve high-resolution internal mapping of metallic structures, I designed and fabricated a 64-element Hall-effect sensor array configured in a modular square grid. The architecture utilized 16-bit multiplexers with 4-bit selection logic—controlled via oscilloscope digital outputs—to streamline data acquisition into a single, low-noise coaxial output. To ensure signal integrity in a magnetically sensitive environment, I engineered a 4-layer PCB stackup (Front, PWR, GND, Back), strategically routing all signal traces to the back layer to utilize the internal power and ground planes as EMI shields. By integrating localized decoupling capacitors at each sensor node and developing a custom chemical etching process for rapid prototyping, I reduced noise interference and accelerated spatial data collection by 600%.
SARVESH SENTHILKUMAR 